How many dead pixels are needed for a monitor warranty replacement?

Most consumer monitors follow ISO 9241-307 Class I or Class II rules, typically requiring more than 2–3 bright dots or 4–5 dark dots for warranty RMA. However, Dell Premium Panel Exchange and ASUS Zero Bright Dot (ZBD) series cover even 1 bright sub-pixel defect.

What is the difference between a bright dot and a dark dot?

A bright dot is a sub-pixel stuck ON that glows red, green, blue, or white on a black screen. A dark dot is an unlit sub-pixel that appears black on white or colored backgrounds.

Reviewed: September 25, 2026 · ISO 9241-307 Reference

Monitor dead pixel warranty policies by brand

When you spot a defective pixel on a new monitor, warranty eligibility depends on whether the defect is a bright dot (stuck lit on a black screen) or a dark dot (unlit on a white screen), as well as the manufacturer's ISO 9241-307 class.

By MonitorTest Editorial TeamOpen dead pixel testMethodology & limits

Figure 1: A dead pixel stays unlit (dark on white backgrounds), whereas a stuck sub-pixel remains lit in red, green, or blue on a black screen. Surface dust sits on the outer coating above intact RGB sub-pixels.

Interactive pixel warranty & RMA threshold checker

Enter the number of bright dots (lit on a black screen) and dark dots (black on a white screen) you observed during testing to compare against typical manufacturer reference limits.

Brand or ISO standard profile Bright dots lit on black screen Dark dots dark on white screen Purchase timeframe

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Note: This tool provides an educational reference. Actual warranty coverage depends on your region, retailer, model series, and official warranty documentation.

Typical manufacturer pixel tolerance reference table

Most consumer monitors fall under ISO 9241-307 Class I or Class II tolerances. Manufacturers differentiate between bright sub-pixels (more distracting in dark scenes) and dark sub-pixels:

Brand	Bright Dots Allowed	Dark Dots Allowed	Total Combined	Special Coverage Notes
Dell / Alienware	0 (Replaced at 1+ bright dot)	Up to 5	Up to 5	Premium Panel Exchange covers UltraSharp, P-series, and Alienware displays for even 1 bright sub-pixel.
ASUS	Up to 3 (0 on ZBD models)	Up to 5	Up to 5	Selected ROG, ProArt, and TUF monitors include a Zero Bright Dot (ZBD) warranty.
LG	Up to 2	Up to 4–5	Up to 5	Varies by native resolution and OLED vs. LCD sub-pixel structure.
MSI	Up to 3	Up to 5	Up to 5	Adjacent pixel defects within 15 mm often have stricter replacement thresholds.
Samsung	Up to 2–3	Up to 4–5	Up to 5	Follows ISO 9241-307 Class II guidelines depending on region and panel family.
AOC	Up to 3	Up to 5	Up to 5	AGON PRO models may include first-year Zero Bright Dot protection.
ViewSonic	Up to 2	Up to 2	Up to 3	Lower combined total defect tolerance (replaced above 3 total sub-pixels).
BenQ / ZOWIE	Up to 3	Up to 5	Up to 5	Professional DesignVue/PhotoVue lines may offer regional bright-dot guarantees.

How to document a pixel defect for RMA or return

Test within the first 48 hours: Run the full-screen dead pixel test across black, white, red, green, and blue backgrounds before your retailer's return window expires.
Rule out dust and software artifacts: Turn off the display and clean the area gently with a dry microfiber cloth. Take a screenshot and open it on a second device to confirm the dot is not rendered by software.
Capture two clear photos: Take one wide photo showing the entire monitor frame and serial-number sticker, and one close-up showing the defective pixel without night-mode overexposure.

Frequently asked questions

Does 1 dead pixel qualify for a warranty replacement?

Under standard ISO 9241-307 Class II policies, a single dark sub-pixel usually does not trigger a warranty replacement. However, a single bright dot is covered on Dell Premium Panel and ASUS ZBD models, and retail return policies within the first 14–30 days often allow exchanges regardless of pixel count.

Why are bright dots treated more strictly than dark dots?

A sub-pixel stuck ON emits light continuously against dark backgrounds, making it far more noticeable in movies and games than a single unlit sub-pixel on a high-PPI panel.